css/css-fonts/font-size-adjust-order-001.html

<!DOCTYPE html>
<meta charset="utf-8">
<title>CSS Fonts Test: font-size-adjust effect on font-dependent units</title>
<link rel="author" title="Jonathan Kew" href="mailto:jkew@mozilla.com">
<link rel="help" title="2.6 Relative sizing: the font-size-adjust property"
      href="https://drafts.csswg.org/css-fonts/#font-size-adjust-prop">
<link rel="help" title="6.1.1. Font-relative Lengths: the em, rem, ex, rex, cap, rcap, ch, rch, ic, ric, lh, rlh units"
      href="https://drafts.csswg.org/css-values-4/#font-relative-lengths">
<meta name="assert" content="font-size-adjust affects the size of the 'ch' unit consistently regardless of the ordering of properties.">
<link rel="match" href="font-size-adjust-order-001-ref.html">
<style>
  div {
    margin: 10px;
    font: 20px monospace;
    background: yellow;
  }
  #bg {
    width: 12ch;
    height: 2em;
    background: red;
    position: absolute;
    z-index: -1;
  }
  #test1 {
    /* Size the font by its ex-height; this will enlarge the glyphs
       so the red background block is hidden. */
    font-size-adjust: 1.0;
    width: 10ch;
  }
  #test2 {
    /* This should work exactly the same. */
    width: 10ch;
    font-size-adjust: 1.0;
  }
</style>
<body>
  <p>Test passes if both blocks render the same, and there is no red:</p>
  <div id="bg"></div>
  <div id="test1">The quick brown fox jumps over the lazy dog</div>
  <div id="bg"></div>
  <div id="test2">The quick brown fox jumps over the lazy dog</div>
</body>